28660392 has 96 divisors (see below), whose sum is σ = 84127680. Its totient is φ = 9123840.

The previous prime is 28660367. The next prime is 28660393. The reversal of 28660392 is 29306682.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28660393) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44392 + ... + 45032.

It is an arithmetic number, because the mean of its divisors is an integer number (876330).

Almost surely, 2^28660392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28660392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42063840).

28660392 is an abundant number, since it is smaller than the sum of its proper divisors (55467288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28660392 is a wasteful number, since it uses less digits than its factorization.

28660392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685 (or 669 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 28660392 is about 5353.5401371429. The cubic root of 28660392 is about 306.0276791571.

The spelling of 28660392 in words is "twenty-eight million, six hundred sixty thousand, three hundred ninety-two".